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Trimble Lassen SK-II

GPS interface module for embedded applications

8 Channel Operation, 5V Powered

		Power consumption <0.5 W Operating temp -40° to +85°C Next-generation RF technology Compatible with the Lassen-SK8 Differential GPS (DGPS) ready Choice of three data protocols Different antennas available Starter kit available Datasheet/Manual: Datasheet in PDF format Manual in PDF format

Introduction

The new Lassen ™ SK II GPS module is one of the newest members of Trimble's renowned Lassen line of OEM GPS products for embedded applications. Lassen SK II builds on the original Lassen-SK8's outstanding performance and success in demanding automotive applications. The Lassen SK II is intended primarily for OEMs and system integrators who require maximum GPS performance, flexible configuration capability and low power usage. Just two-thirds the size of a business card and fully backward compatible with the Lassen-SK8, Lassen SK II makes use of the latest advances in silicon technology to offer even more robust RF performance. Tighter integration of the RF front end using the new Colossus ASIC has slashed the component count by 25 per-cent, cutting power consumption to less than 0.5 watts.

Top Performance

Using Trimble's 8-channel technology, Lassen SK II delivers rapid startup times and reliable performance over the entire -40° to +85° C extended temperature range. Lassen SK II incorporates Trimble's proven software, which outputs highly accurate position data even in areas where satellite signals are weakened by terrain, foliage and structures. The Lassen SK II is also differential GPS (DGPS) ready for applications requiring high levels of accuracy. A full measurement feature is available for advanced applications.

Ease Of Integration

Lassen SK II's user-configurable, dual I/O serial ports mean greater flexibility and fast integration. A choice of three data protocols provides the user with maximum configuration capability. The primary serial port may be configured either to the TSIP (Trimble Standard Interface Protocol) binary data protocol for total control over system operation; or to the easy-to-use TAIP (Trimble ASCII Interface Protocol), which is ideal for tracking applications. The secondary serial port outputs NMEA-0183 standard data messages and can receive RTCM SC-104 differential correction data for two-meter DGPS accuracy. The Lassen SK II also incorporates Trimble's antenna detection and protection features to monitor the condition of the GPS antenna system.

Lassen SKII tarter Kit

Lassen SK II's Starter Kit provides everything you need to get started integrating state-of-the-art GPS into your application.

Specification
Performance:
General:	L1 frequency, C/A code (SPS), 8-channel, continuous tracking receiver, 32 correlators
Update rate:	TSIP @ 1Hz; NMEA @ 1Hz; TAIP @ 1Hz
Accuracy:	Horizontal: <6 meters (50%), <9 meters (90%) Altitude: <11 meters (50%), <18 meters (90%) Velocity: 0.06 m/sec PPS: ±95 nanoseconds
DGPS accuracy:	Position: 2m CEP (50%) Velocity: 0.06 m/sec (1 sigma)
Acquisition:	Hot start: <15 seconds (90%) Warm start: <42 seconds (90%) Cold start: <130 seconds (90%) Cold start requires no initialization. Warm start requires last position, time and almanac saved in battery back-up memory. Hot start requires that the ephemeris also saved.
Reacquisition:	<2 seconds (90%) (after signal loss)
Dynamics:	Acceleration: 4g (39.2 m/sec2) Motional Jerk: 20 m/sec3
Operational limits:	Altitude <18,000m or velocity <515 m/sec Either limit may be exceeded but not both.
Environmental:
Operating temp:	– 40°C to +85°C
Storage temp:	–55°C to +100°C
Vibration:	0.008 g2/Hz 5Hz to 20Hz 0.05 g2/Hz 20Hz to 100Hz 3dB/octave 100Hz to 900Hz
Operating Humidity:	5% to 95% R.H. non-condensing, @ +60°C
Electrical:
Prime power:	+5V DC, ±5%
Consumption:	GPS board only: 95mA, 0.47W With antenna: 120mA, 0.60W
Back-up power:	+3.2 to +5V DC 2µA @ +3.5V, +25°C (nominal)
Antenna power:	5V at 25mA available Open-circuit detection Short-circuit protection
Interface Characteristics:
Serial ports/1PPS:	CMOS TTL levels
Supported Protocols:	TSIP @ 9600 baud, 8-Odd-1 (configurable) TAIP @ 4800 baud, 8-None-1 (configurable) NMEA 0183 v2.1 @ 4800 baud, 8-None-1 (configurable) RTCM SC-104 @ 4800 baud, 8-None-1
NMEA messages:	GGA, VTG, GLL, ZDA, GSV, GSA and RMC Messages selectable by TSIP command; selection stored in non-volatile memory
Other:
Dimensions:	3.25" x 1.25" x 0.40" (82.6mm x 31.2mm x 10.2mm) without connectors
Weight:	0.7 oz. (19.6 g) without optional shield
Connectors:	RF: SMB I/O: 8-pin (2x4), 0.100” header
ROHS Status:	This product is lead free/ROHS compliant.

Accessories
	Bullet III Antenna Designed for fixed mounting via standard 3/4" pipe thread Optional cable and adapters available 35 dB ± 3 dB gain Dimensions: 77.5 mm x 66.2mm Weight: 170g Part number: 57860-10 BULLET III 5V F-style 57860-00 BULLET III 5V TNC This product is lead free/ROHS compliant. See here for more details
	Hard Mount GPS Antenna Compact, hard mount, active micropatch antenna TNC connector 26dB gain Dimensions: 62.6 mm x 19.0 mm Weight: 180g Part number - 57860-70 This product is lead free/ROHS compliant. See here for more details
	Miniature 5V GPS Antenna Compact, active micropatch antenna with 5-meter cable SMB or SMA connector Magnetic mount 29dB gain Dimensions: 30.8mm L x 35.8 mm W x 11.8 mm H Weight: 100g with cable Part number: 56237-00 (SMB Connector) 56237-40 (SMA Connector) This product is lead free/ROHS compliant. See here for more details
	RF Shield Optional snap-on shield kit for severe RF environments. Part number: 39665-10 This product is lead free/ROHS compliant.

Ordering Details:
Board:	38116-25 Lassen SK-II 5V, DGPS ready, SMB connector, ROHS compliant (For reference, the old non ROHS compliant part number was 38116-20) Please note that boards are supplied with no cables, software or manuals. Software/manuals are available electronically.
Accessories:	ROHS compliant parts (old non-ROHS part number in brackets): 56237-00 (40767-00) 29 dB magnetic mount antenna, 5-meter cable, ROHS compliant 57860-10 (41556-10) BULLET III 5V GPS ANTENNA F-style 57860-00 (41556-00) BULLET III 5V GPS ANTENNA TNC 23420 50 Foot (15 meter) RG-59 antenna cable with F connectors. 22806 F-SMB converter cable 57860-70 (28367-70) 26 dB hard mount antenna, TNC connector, ROHS compliant 39665-10 Shield kit for Lassen SK-II, ROHS compliant 38982-05 (38982-00) Lassen SK-II starter kit, ROHS compliant Starter kit includes Lassen SK II board, interface motherboard in durable metal enclosure with dual DB9, RS-232 interface, AC/DC power converter, magnetic mount antenna, TSIP and NMEA protocols, software toolkit for TSIP, interface cable and manual.
Further Information:	Want further information or pricing on this product? Either fill out our feedback form or contact us for further information.

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